Energy-Momentum Relation in Liquid Helium by Inelastic Scattering of Neutrons

Abstract

The wavelength change of neutrons scattered inelastically from liquid helium at several temperatures was measured at angles of scattering of 45.4 deg 90, 35, and 80 deg . At the lowest liquid temperatures, the broadening due to the liquid helium is <0.5 deg K;. At the lowest liquid temperature thcre is a well defined change in wavelength of the scattered neutrons. The corresponding changes in energy and momentum of the scattered neutrons were calculated for each angle. (W.D.M.)